1.One - One function or Injection:-
- If every element of the domain is mapped with unique elements of Range.
- If the domain has 'm' elements then range must have 'n' elements such that
let |A| = n and |B| = m then the total number of one -one function from A to B is:-
example: Is is One -One function?
If anywhere you are asked about one-one function what you need to do is like this:
now equate them:
or Since we are getting two value for ,so it is not One -One function.